ci: deploy only on the main branch

.github/workflows/build.yml

@@ -5,7 +5,7 @@ on:
   workflow_dispatch:
 
 env:
-  tag_name: ${{ github.ref_name }}
+  BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
 
 jobs:
   build:
@@ -43,7 +43,7 @@ jobs:
       - name: Ensure version is equal to tag
         if: startsWith(github.ref, 'refs/tags/')
         run: |
-          [ "${{ env.game_version }}" == "${{ env.tag_name }}" ] || exit 2
+          [ "${{ env.game_version }}" == "${{ env.BRANCH_NAME }}" ] || exit 2
 
       - name: Export Marble
         uses: ./.github/actions/export-game
@@ -62,12 +62,12 @@ jobs:
 
       # Installing rsync is needed in order to deploy to GitHub Pages. Without it, the build will fail.
       - name: Install rsync
-        if: ${{ matrix.platform == 'web' }}
+        if: ${{ (matrix.platform == 'web') && (env.BRANCH_NAME == 'main') }}
         run: |
           apt-get update && apt-get install -y rsync
 
       - name: Deploy to GitHub Pages
-        if: ${{ matrix.platform == 'web' }}
+        if: ${{ (matrix.platform == 'web') && (env.BRANCH_NAME == 'main') }}
         uses: JamesIves/github-pages-deploy-action@v4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/publish.yml

@@ -7,7 +7,7 @@ on:
     types: [completed]
 
 env:
-  head_branch: ${{ github.event.workflow_run.head_branch }}
+  BRANCH_NAME: ${{ github.event.workflow_run.head_branch }}
 
 jobs:
   set_tag_name:
@@ -18,8 +18,8 @@ jobs:
     steps:
       - name: Check Tag
         run: |
-          if [[ ${{ env.head_branch }} =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-            echo "tag_name=${{ env.head_branch }}" >> "$GITHUB_ENV"
+          if [[ ${{ env.BRANCH_NAME }} =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            echo "tag_name=${{ env.BRANCH_NAME }}" >> "$GITHUB_ENV"
           else
             echo "tag_name=null" >> "$GITHUB_ENV"
           fi